Students classified as emotionally disturbed receiving special education services will drop out of school at a rate of 56% nationwide, and one out of three will be incarcerated within 3 years of leaving school. This study provides school personnel and clinicians with new information regarding underlying attachment difficulties and aggression in…

Teachers encounter immense variety in literary competence among students in their secondary school classrooms. Yet, little is known about how they perceive and deal with this variety. Moreover, little is known about the literary development that students undergo during their school career and the different levels of development that can be…

This quantitative and qualitative interpretive exploratory case study investigates whether exposure to an Internet based "Extended Cyberhunt" strategy enables teachers to attain a set of outcomes similar to Prensky's "Essential 21st Century Skills" and the "Critical Outcomes of the South African National Curriculum…

Using data from a nationwide, large-scale experimental study of the effects of a connected classroom technology on student learning in algebra (Owens et al., 2004), this dissertation focuses on challenges that can arise in estimating treatment effects in educational field experiments when samples are highly heterogeneous in terms of various…

This dissertation examined the status of data-based research in applied linguistics through an analysis of published research studies in nine peer-reviewed applied linguistics journals ("Applied Language Learning, The Canadian Modern Language Review / La Revue canadienne des langues vivantes, Current Issues in Language Planning, Dialog on Language…

On the basis of taxometric analyses of data sets that they created to pose interpretive challenges, S. R. H. Beach, N. Amir, and J. J. Bau (2005) cautioned that using comparison data simulated by J. Ruscio's programs can lead to inaccurate conclusions. Careful examination of S. R. H. Beach et al.'s methods and results plus reanalysis of their data…

The main purpose of this study was to compare the strategies used by Chinese-speaking students when confronted with familiar versus unfamiliar topics in a multiple-choice format reading comprehension test. The focus was on describing what students do when they are taking reading comprehension tests by asking students to verbalize their thoughts.…

Classifier languages are spoken by a large portion of the world's population, but psychologists have only recently begun to investigate the psychological reality of classifier categories and their potential for influencing non-linguistic thought. The current work evaluates both the mental representation of classifiers and potential cognitive…

Eyewitness identification decisions are vulnerable to various influences on witnesses' decision criteria that contribute to false identifications of innocent suspects and failures to choose perpetrators. An alternative procedure using confidence estimates to assess the degree of match between novel and previously viewed faces was investigated.…

This article reports a study that investigated the effects of Q-matrix misspecifications on parameter estimates and misclassification rates for the deterministic-input, noisy "and" gate (DINA) model, which is a restricted latent class model for multiple classifications of respondents that can be useful for cognitively motivated diagnostic…

Presented at the national conference for AERA (American Educational Research Association) in April 2009. The large variability of SAT taker population across states makes state-by-state comparisons of the SAT scores challenging. Using a mixture modeling approach, therefore, the current study presents a method of identifying subpopulations in terms…

Many scholars have commented on the changing significance of farming for understanding the dynamics of social and economic change in contemporary rural America. Quantitative analyses of relationships between farming, local socioeconomic conditions, demographic trends, and policy have often relied on an indicator of "farm-dependent" (FD) counties…

This study examined attitudinal and behavioral differences between internal and external locus of control (LOC) consumers on credit card misuse, the importance of money, and compulsive buying. Using multiple analysis of variance and separate analyses of variance, internal LOC consumers were found to have lower scores on credit card misuse and…

In this three-state study, the authors estimate the magnitudes of achievement gaps between English learner (EL) students and their non-EL peers, while avoiding typical caveats in cross-sectional studies. The authors further compare the observed achievement gaps across three distinct dimensions (content areas, grades, and states) and report…

Quantitative behaviour analysis requires the classification of behaviour to produce the basic data. This can be challenging when the theoretical taxonomy does not match observational limitations, or if a theoretical taxonomy is unavailable. Binary keys allow qualitative observation to be used to modify a theoretical taxonomy to produce a practical…